wyman



(No Model.) ZSheets-Sheet 1. H. WYMAN 8: J. A. CLARK.

LOOM.

No. 480,684. Patented Aug. 9, 1892 wAsHmm'ou, 114 c (No Model.) 2SheetsSheet 2.

H. WYMAN & J. A. CLARK.

LOOM.

Patented Aug. 9, 1892.

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UNITED STATES PATENT OFFICE. Y

HORACE VVYMAN AND JOHN A. CLARK, OF WORCESTER, MASSACHUSETTS ASSIGNORSTO THE CROMPTON LOOM WORKS, OF SAME PLACE.

LOOM.

SPECIFICATION forming part of Letters Patent No. 480,684, dated August9, 1892.

Application filed February 13, 1892- Serial No. 421,381. (No modeL) Toall whom it may concern.-

Be it known that We, HORACE WYMAN and JOHN A. CLARK, of Worcester,county of Worcester, State of Massachusetts, have invented anImprovement in.Looms, of which the following description, in connectionwith the accompanying drawings, is a specification, like letters andfigures on the drawings representing like parts.

This invention has for its object to improve that class of loom shown inUnited States Patent No. 162,904,-it showing upright levers havinglaterally-extended projections, the outer ends of which support thepivots of the notched jacks, which are engaged either by a lifter or adepressor to move the lovers and their connected harness-frames to formsheds. In the loom described in the said patent a jack has at its upperedge nearest its inner end or fulcrum a notch to engage itsactuating-bar placed above it, and at the opposite side of the uprightlever the jack has at its under edge and nearest its free end anothernotch, and the engagement of this notch with its actuating-bar below itis effected by gravity. This class of loom has gone largely into use,and in practice when running the loom at high speed it has been foundthat the jacks at times fail to be caught by the lifter, which resultsin a mispick or imperfection in the woven pattern. In our efforts toimprove this class of loom we have discovered that the loom may be runat even greater speed than ever before attempted or thought possible,and that also without the possibility of a mispick or fault due tofailure of the jack to be properly caught when forming the shed. We havebeen enabled to gain these important advantages by improvements in theconstruction of the jacks in such manner that the engagement of thenotches at the outer or free ends of the jacks with their actuating-baris efiected by the pattern-chain as apositive motion instead of bygravity, as heretofore. It willbe obvious that the end of a jackfarthest from its center of motion will in a given time travel through alonger distance than will a point on the said jack substantially midwayits ends, where is located the elevating-notch. In the loom described inthe patent referred to gravity was depended upon to turn the jack andbring into operative position that one of its notches having the longestdistance to travel, while in our invention the positive motion of thepattern-chain is employed to bring into operative position that notchwhich has the longest distance to travel, and by this change we havefound that the loom may be run faster and do better Work than with theold form of jack. So, also, by making the elevating-notch at the loweredge of the jack, and the depressing-notch at the upper edge of the jackand farther from the fulcrum of the jack than the lifting-notch, it ispossible to place the elevator below the jack instead of, as heretofore,between the upper side of the jack and the lateral projection of theupright lever, this feature being of very considerable importance forthe reason that when the elevator is entirely below the jack an uprightlever may be quickly removed from the loom in case of accident andwithout disconnecting the lifter from its actuating devices and removingthe same. WVe have devised a locking-bar to co-operate with and keep theslotted hubs of the upright levers on their fulcrum-rod, and we haveprovided devices whereby the said fulcrum-rod may be adjusted at willand be locked in adjusted position. In order that the lifter and de- 8cpressor engaging these jacks to move the upright levers and actuate theusual harnessframes to form sheds may move the said jacks most directlyand positively and for the v proper distance and with the proper slowpoints to keep the shed open as long as possible, We have combined withthe said upright levers and notched jacks a rock-shaft having armsextended therefrom at opposite sides, and the said rock-shaft armshaving connectc ing-rods attached to the ends of the lifter anddepressor are made to occupy a nearly upright position when the shed isevened anda nearly horizontal position when the shed is opened. We havealso so shaped that part 5 of the loom-frame for supporting the uprightlevers that the said frame while made lighter in weight and of less costis also made stronger and so as to afford more ready access to the saiduprightlevers. We have made one of the 1:1

connecting-rods adjustable as to its length to thereby enable the barconnected with it to be adjusted with relation to the upright levers. Wehave also provided a novel comb-like guide for the jacks, the guidehaving a series of fingers extended over the pattern-surface to apointnear where a projection of the pattern-surface meets the said jacks todistribute them.

Figure 1 is a partial side elevation of a sufficient portion of a loomof the type referred to to enable our improvements to be understood, thesupport for one end of the patterncylinder being in section in the line:10, Fig.2. Fig. 2 is a top or plan view of the parts shown in Fig. 1,allbut two upright levers being removed to avoid confusion; Fig. 3, asectional detail showing an upright lever, its supporting-rod, thelocking-bar, and lifter and depressor and jack safety-bar being insection.

-Before describing our present improvements we will state that thenotched ends of the upright levers A will in practice be connected bycording to the upper and lower sides of usual harness-frames, as in saidpatent, to thus form sheds in the warp when the levers are separated.The crank or lay shaft A and the pattern-shaft A ,havinga patternsurface or chain A, (partially shown,) are and may be of any usual orsuitable construction and be actuated in any usual manner, as in saidpatent. The upright levers having open slotted hubs a to fit over thelever-fulcrum a, have their hubs so shaped or curved externally (seeFig. 3) as to receive against or very near the circular outer faces ofthe hubs a lockingbar a adj ustably connected at each end to theframework by like set-screws a extended through slots in ears at eachend of the said bar, said screws enteringthe framework. The projectionsA at their outer ends receive the pivots or fulcrum-studs a of the jacksI), having each alifting-notch b and a depressing-notch b the notch 12being at one side and the notch 79 at the other side of the said lever,the engaging faces being oppositely arranged, the notch b at the underside of the jack being nearer the fulcrum of the jack than the notch bat the upper side of the jack. In the movement of the jack the parthaving the notch 12 at the greater distance from the fulcrum travelsover a greater distance than the part of the jack having the notch bwhich is nearer the fulcrum, and the notch having the greater distanceto travel before engaging its actuator is the one which in our inventionis moved into position positively by the pattern mechanism rather thanby gravity, as in the old way. The lifter c is'located entirely belowthe jack, leaving the space above the jack and between it and theprojection A free and unobstructed- Viewing Fig. 3, it will be seen thatthe shape of the lever A is peculiar, the shape shown being desirable,as it makes room for the working of the lifter below the jacks andbetween the lever and the pattern-surface. In the old form of lever thefulcrum thereof was located at or nearthe center line of the lever; butherein it will be noticed that the hub of the lever A is extended fromone edge thereof, herein shown as the edge nearest the lifter, and thatthe slot in the said hub to embrace the fulcrum-wire a ischiefly at oneside of the longitudinal center of the lever; or,in 0th 91:

words, if a line be drawn in Fig. 3 from the center of. the fulcrum-roda to substantially the middle of the lever at its upper end said linewill fall, especially from the point where the projection A starts fromthe lever to the said hub outside of or along and substantially parallelto one edge of said lever. This illustration is made to make evident thefact that additional space is left at and along the outer edge of thelever A from its hub to the projection A for the lifter to move in. Suchnew shape obviates extending the projection A, thus adding to the weightof the lever and increasing the area occupied by the working parts ofthe shed-forming mechanism.

The loom-frame has a jack safety-bar h for the outer ends of the jacks,close to or on top of which rest and move the outer or free ends of thejacks b as the latter, engaged by the depressor c, are being moved toactuate the levers, to which they are connected, said safety devicepreventing the slipping ofl. from the depressor of any of the jacksraised quickly and positively by the pattern-surface to be so engagedprior to forming a shed. The distribution of the jacks by the patternpreparatory to forming a new shed is efiected about as or while thecontiguous faces of the lifter and depressor act against opposite edgesof the levers to even the warps and closeithe shed. To quickly remove ajack under our construction the locking-bar screws a will be slackenedto thereby enable the said bar to be turned back away from the hubs ofthe le- 1 vers A, and the jacks are then free to be lifted from the rod0/, a slight separation of the litter and depressor enabling the leverto be drawn up out of the loom between them.

The opposite ends of the lifter 0, extended through inclined slots c andhaving ball-like heads, (shown in dotted lines, Figs. 1 and 2,) areengaged by like parts 0 of like connecting-rods 0 the parts a beinglongitudinally adjustable by bolts 8 in suitable slots, and the saidconnecting-rods at their opposite ends are attached adjustabl y by likebolts 9 to arms 10 1O at opposite ends of but extended downwardly from arock-shaft O, mounted in suitable bearings in the loom-frame and havingattached to and extended upwardly arms 12 13, one arm, as 13, beingpreferably longer than the other arm 12, the arms 10 at one side therook-shaft being each shorter than the corresponding arm 10 at the otherside of the center of the said rock-shaft. These upper arms 12 13 haveattached to them in an adjustable manner the connecting-rods C 0 in turnjointed to the opposite ends of the depressor, guided in the slots 0'.The rock-shaft O has an arm (3, to which is jointed the upper end ofalink or connecting rod 0', jointed at its lower end to a suitable crankor crank-pin O of the lay or crank shaft A The pattern surface or chainis supposed to and may be of any usual construction, andin practicetheshaft A thereof may be actuated in any usual manner. In this presentinstance of our invention the bearings for the pattern-surface shaft Ahave ears 'm, one of which ears is shown fully in Fig. 2, the said ears,as shown, receiving through them bolts m, which confine to the ears mthe finger-bar m having attached to its upper end, as herein shown, theseries of fingers m which latter are extended upward and forward betweenthe jacks at a point quite near the pattern-surface, said comb-likeguide acting to prevent any lateral movement under strain of the jacksor levers.

The peculiar location of the notches of the jacks, as described, and thepositive movement given to that notch which has the greater distance totravel constitutes an important part .of our invention; but it is notintended herein in all instances to limit our invention to the exactmeans shown for actuating the lifter and depressor or to the exact formof patternsurface shown, as the same may be varied and other known orsuitable devices may be used Without departing from our invention.

The fulcrum-rod a,which sustains the hubs of the levers A, is mounted instands 20, attached by suitable bolts 21 to ears 22 of the framework,each ear having a slot, through which are extended the bolts 21, saidslots permitting the vertical adjustment of the stands 20 by rotating inone or the other direction the foot-screws 23, the bolts 21 clamping thestands in adjusted position. These devices form a very simple means forsupporting and adjusting the fulcrum for the levers.

The slots in the arms 1 0, 10*, 12, and 13, in which are located thestud-bolts, which serve to pivotally attach the connecting-rods formoving the actuating-bars c c or lifter and depressor, as they aresometimes called, are in arcs of circles substantially concentric to thecenter lines of the actuating-bar when the latter are in the positionshown in the drawings, the bars being in contact with the levers to eventhem. By reason of these slots (marked t 15 19 &c.,) the studs referredto as located in said slots may in this position of the bars 0 c beadjusted toward or from the rockshaft 0 to accommodate for anydesiredopening of the shed and yet have the levers evened properly.

Having described our invention, what we claim, and desire to secure byLetters Patent, 15-- 1. A harness-lever provided at one edge with aprojecting arm, a jack pivotally mounted on said arm and provided at itsunder side nearest its pivotwith a notch and at its uping of the jack toplace its notch farthest from the pivotal point in position to beengaged by the actuating-bar acting as a depressor, substantially asdescribed.

2. A harness-lever provided at one edge with a projecting arm, a jackpivotally mounted on said arm and provided at its under side nearest itspivot with a not h'and at its upper side yet farther from its pivot witha second notch, combined with actuating-bars acting as alifter and adepressor, and a pattern-surface, the raising of the jack to place itsnotch farthest from the pivotal point in position to be engaged by theactuating-bar acting as a depressor, being effected positively by thepattern-surface, and a jack safety-bar to insure the continuousengagement of the jacks with the depressor during the opening andclosing of the shed, substantially as de scribed.

3. In a loom, a harness-lever provided at one edge with a projectingside arm, a jack pivoted upon one end of said projection and extendedtoward and across the said lever and provided at its under side at oneside of said lever with alifting-notch and at its upper side at theopposite side of said lever with a depressing-notch, a pattern-surface,a lifter located belowthe said notched jack and at the side of the leverhaving the pivot of the jack, and a depressor located above said notchedjack at that side of the said lever beyond which the free end of thesaid jack is extended, whereby the jack may be removed without detachingthe lifter, substantially as described.

4. In a loom, a harness-lever provided at one edge with a projectingside arm, a jack pivoted upon one end of said projection and extendedtoward and across the said lever and provided at its under side at oneside of said lever with a lifting-notch near the pivot of the jack andits upper side at the opposite side of said lever with adepressing-notch far ther from the pivot of the jack, apattern-surface,alifterlocatedbelowthesaid notchedjack' and a depressorlocated above said notched jack at that side of the said lever beyondwhich the free end of the said jack is extended, a rock-shaft havingupwardly and downwardly extended arms, connections between said arms andthe lifter and depressor, and guides for said lifter and depressor,substantially as described.

5. In a loom, a harness-lever provided at one edge with a projectingside arm, a jack pivoted upon one end'of said projection and extendedtoward and across the said lever and provided at its under side at oneside of said lever with a lifting-notch near the pivot of the jack andat its upper side at the opposite side of said lever with adepressing-notch farther from the pivot of the jack, apattern-surface, alifter located below the said notched jack and projecting side arm, anda depressor located above said notched jack at that side of the saidlever beyond which the free end of the said jack is extended, arock-shaft havin g upwardly and downwardly extended arms, connectionsbetween said arms and the lifter and depressor, guides for the lifterand depressor, and devices to impart to the said rock-shaft a movementto carry the arms from a substantially vertical into a substantiallyhorizontal position, substantiallyas described.

6. In a loom, a harness-lever provided at one edge with a projectingside arm, a jack pivoted upon one end of said projection andextendedtoward and across the said lever and provided at its under side at oneside of said lever with a lifting-notch near the pivot of the jack andat its upper side at the opposite side of said lever with adepressing-notch farther from the pivot of the jack, apattern-surface topositively raise the jack to place its depressing-notch in engagementwith the depressor, a litter locatedbelow the said notched jack andprojecting side arm, and a depressor located above said notched jack atthat side of the said lever beyond which the free end of thesaid jack isextended,a rock-shaft havin g upwardly and do wnwardly extended arms,connections between said arms and the lifter and depressor, guides forsaid lifter and depressor, the connections between the litter and thearms of the rock-shaft being adjustable in the direction of theirlength, substantially as described.

7. In a loom, a harness-lever provided at one edge with a projectingarm, a jack pivoted upon one end of said arm and extended toward andacross the said lever and provided at its under side at one side of saidleverwith a lifting-notch near the pivot of the jack and at its upperside at the opposite side of said lever with a depressing-notch fartherfrom the pivot of the jack, a pattern-surface to positively raise thejack to place its depressing-notch in engagement with the depressor, alitter located below the said notched jack and projecting side arm, adepressor located above said notched jack at that side of the said leverbeyond which the free end of the said jack is extended, and a rock-shafthavin g upwardly and downwardly extended arms, the said arms at oppositesides of the longitudinal center of the rock-shaft being of differentlengths, substantially as described.

8. The harness-levers having slotted hubs, the loom-frame, the stands tosupport the fulcrum-rod for the said levers, the fulcrum-rod, andadjusting-screws 23, combined with setscrews 21, to' operatesubstantially as described.

In testimony whereof we have signed our names to this specificationinthe presence of two subscribing, witnesses.

HORACE WYMAN. JOHN A. CLARK.

Witnesses:

JUSTIN A. WARE, SAMUEL B. SoHoFIELn.

